Moving Kitchen Plumbing Concrete Slab . The plumbing trenches are typically dug at the same time as the slab footings, if any. William on may 20, 2017. Digging Holes and Playing in the Dirt...In the Basement Danks and Honey from www.danksandhoney.com The plumber will have to break up the concrete slab to move the pipes. The sink faces the family room (and counter seating). The cost to move plumbing fixtures can be in the region of $2000 or more if you have a complex project.